He was great his freshman year and was looked at as lottery pick. But he decided to stick around and be 'the guy' at OU and it has really hurt him. He had a terrible season but some players do thrive in the NBA.

You definitely have to look at the body of work in College. However, check which players are dominating in the workouts. Last year, Tyreke Evans was inviting all competition and killing all players at team workouts. A few years ago, Brandon Roy had stellar reviews with his team workouts. If you're not a top 3 pick (players secure in their draft order), players wanting only individual workouts (Derozan, Gerald Green, Robert Swift) have something to hide.